A Jersey City motorist tried to snatch a gun from an armed robber who confronted him at a stoplight yesterday morning, police said.

At 2:25 a.m., the 47-year-old Trenton Street resident was stopped at a red light at Ocean Avenue and Wegman Parkway when a man approached his passenger side window, police said.

The man pointed a black semiautomatic pistol at the victim and said, “Give me your ring, watch and wallet,” police said. The victim attempted to grab the gun, but was unable to reach it when his seat belt tightened, police said.

The robber said, “Give me your ... or I’m going to shoot you,” police said. The victim gave the man his wallet and the assailant fled north on Ocean Avenue, police said.

The victim stayed in the area and observed the robber at Grant and Ocean avenues before pursuing him in his car, police said. The robber was last seen fleeing into an alleyway at Grant Avenue, police said.

Anyone with information on this incident should call the police tip line at (201) 547-JAIL.